66 31 006 Removing and installing (replacing) ACC sensor

Necessary preliminary tasks: 

• Remove front bumper trim  . See 51 11 156 REMOVING AND INSTALLING FRONT BUMPER TRIM .

Lift out wiring harness (1) at points (2).

Disconnect impact absorber (3) at carrier (4) and remove.

Fig 1: Lifting Out Wiring Harness

Courtesy of BMW OF NORTH AMERICA, INC.

Installation: 

Mountings (1) of impact absorber (2) must not be damaged.

Fig 2: Identifying Impact Absorber Mountings

Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten plug connection (1) and disconnect.

Unscrew nuts (2).

Installation: 

Replace self-locking nuts.

Release screw (3).

Feed out ACC sensor (4) with retaining plate (5) in direction of arrow and remove.

Fig 3: Removing ACC Sensor With Retaining Plate And Nuts

Courtesy of BMW OF NORTH AMERICA, INC.

Unfasten plug connection (1) and disconnect.

Unclip electric cable (2) at cable guides (3).

Fig 4: Removing Plug Connection And ACC Sensor From Retaining Plate

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (4) and remove ACC sensor (5) from retaining plate (6).

Installation: 

Adjustment aid (1) must not be damaged.

If necessary, detach adjustment aid (1) from retaining plate (2). To do so, unlock catches (3) and detach adjustment aid (1) in direction of arrow from retaining plate (2).

Fig 5: Detaching Adjustment Aid From Retaining Plate

Courtesy of BMW OF NORTH AMERICA, INC.

Replacement: 

Carry out rough adjustment of ACC sensor (1).

If necessary, perform rough adjustment at adjusting screws (2).

• Measurement A [mm]: 22.5 to 25.0

Replacement: 

Carry out ACC sensor adjustment  using BMW diagnostic system.

Fig 6: Identifying ACC Sensor And Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Replacement: 

Carry out programming/coding.